6 files changed, 27 insertions, 14 deletions

diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h
index dbd689d556ce..ccbb53e22024 100644
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -46,8 +46,6 @@ static inline int init_new_context(struct task_struct *tsk,
                 mm->context.asce_limit = STACK_TOP_MAX;
                 mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
                                    _ASCE_USER_BITS | _ASCE_TYPE_REGION3;
-                /* pgd_alloc() did not account this pud */
-                mm_inc_nr_puds(mm);
                 break;
         case -PAGE_SIZE:
                 /* forked 5-level task, set new asce with new_mm->pgd */
@@ -63,9 +61,6 @@ static inline int init_new_context(struct task_struct *tsk,
                 /* forked 2-level compat task, set new asce with new mm->pgd */
                 mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
                                    _ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
-                /* pgd_alloc() did not account this pmd */
-                mm_inc_nr_pmds(mm);
-                mm_inc_nr_puds(mm);
         }
         crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));
         return 0;
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h
index f0f9bcf94c03..5ee733720a57 100644
--- a/arch/s390/include/asm/pgalloc.h
+++ b/arch/s390/include/asm/pgalloc.h
@@ -36,11 +36,11 @@ static inline void crst_table_init(unsigned long *crst, unsigned long entry)
 
 static inline unsigned long pgd_entry_type(struct mm_struct *mm)
 {
-        if (mm->context.asce_limit <= _REGION3_SIZE)
+        if (mm_pmd_folded(mm))
                 return _SEGMENT_ENTRY_EMPTY;
-        if (mm->context.asce_limit <= _REGION2_SIZE)
+        if (mm_pud_folded(mm))
                 return _REGION3_ENTRY_EMPTY;
-        if (mm->context.asce_limit <= _REGION1_SIZE)
+        if (mm_p4d_folded(mm))
                 return _REGION2_ENTRY_EMPTY;
         return _REGION1_ENTRY_EMPTY;
 }
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 411d435e7a7d..063732414dfb 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -493,6 +493,24 @@ static inline int is_module_addr(void *addr)
                                    _REGION_ENTRY_PROTECT | \
                                    _REGION_ENTRY_NOEXEC)
 
+static inline bool mm_p4d_folded(struct mm_struct *mm)
+{
+        return mm->context.asce_limit <= _REGION1_SIZE;
+}
+#define mm_p4d_folded(mm) mm_p4d_folded(mm)
+
+static inline bool mm_pud_folded(struct mm_struct *mm)
+{
+        return mm->context.asce_limit <= _REGION2_SIZE;
+}
+#define mm_pud_folded(mm) mm_pud_folded(mm)
+
+static inline bool mm_pmd_folded(struct mm_struct *mm)
+{
+        return mm->context.asce_limit <= _REGION3_SIZE;
+}
+#define mm_pmd_folded(mm) mm_pmd_folded(mm)
+
 static inline int mm_has_pgste(struct mm_struct *mm)
 {
 #ifdef CONFIG_PGSTE
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 302795c47c06..81038ab357ce 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -236,7 +236,7 @@ static inline unsigned long current_stack_pointer(void)
         return sp;
 }
 
-static __no_sanitize_address_or_inline unsigned short stap(void)
+static __no_kasan_or_inline unsigned short stap(void)
 {
         unsigned short cpu_address;
 
@@ -330,7 +330,7 @@ static inline void __load_psw(psw_t psw)
  * Set PSW mask to specified value, while leaving the
  * PSW addr pointing to the next instruction.
  */
-static __no_sanitize_address_or_inline void __load_psw_mask(unsigned long mask)
+static __no_kasan_or_inline void __load_psw_mask(unsigned long mask)
 {
         unsigned long addr;
         psw_t psw;
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 27248f42a03c..ce4e17c9aad6 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -14,7 +14,7 @@
  * General size of kernel stacks
  */
 #ifdef CONFIG_KASAN
-#define THREAD_SIZE_ORDER 3
+#define THREAD_SIZE_ORDER 4
 #else
 #define THREAD_SIZE_ORDER 2
 #endif
diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h
index 457b7ba0fbb6..b31c779cf581 100644
--- a/arch/s390/include/asm/tlb.h
+++ b/arch/s390/include/asm/tlb.h
@@ -136,7 +136,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
 static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
                                 unsigned long address)
 {
-        if (tlb->mm->context.asce_limit <= _REGION3_SIZE)
+        if (mm_pmd_folded(tlb->mm))
                 return;
         pgtable_pmd_page_dtor(virt_to_page(pmd));
         tlb_remove_table(tlb, pmd);
@@ -152,7 +152,7 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
 static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
                                 unsigned long address)
 {
-        if (tlb->mm->context.asce_limit <= _REGION1_SIZE)
+        if (mm_p4d_folded(tlb->mm))
                 return;
         tlb_remove_table(tlb, p4d);
 }
@@ -167,7 +167,7 @@ static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
 static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
                                 unsigned long address)
 {
-        if (tlb->mm->context.asce_limit <= _REGION2_SIZE)
+        if (mm_pud_folded(tlb->mm))
                 return;
         tlb_remove_table(tlb, pud);
 }